112 lines
6.4 KiB
C#
112 lines
6.4 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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/*
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*
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* (c) Copyright Ascensio System Limited 2010-2021
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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namespace ASC.Notify.Textile;
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public class MarkDownStyler : IPatternStyler
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{
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static readonly Regex _velocityArguments = new Regex(NVelocityPatternFormatter.NoStylePreffix + "(?<arg>.*?)" + NVelocityPatternFormatter.NoStyleSuffix, RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
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static readonly Regex _linkReplacer = new Regex(@"""(?<text>[\w\W]+?)"":""(?<link>[^""]+)""", RegexOptions.Singleline | RegexOptions.Compiled);
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static readonly Regex _divPTagReplacer = new Regex(@"(<(p|div).*?>)|(<\/(p|div)>)", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled | RegexOptions.Singleline);
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static readonly Regex _tagReplacer = new Regex(@"<(.|\n)*?>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace | RegexOptions.Compiled | RegexOptions.Singleline);
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static readonly Regex _multiLineBreaksReplacer = new Regex(@"(?:\r\n|\r(?!\n)|(?!<\r)\n){3,}", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _symbolReplacer = new Regex(@"\[(.*?)]\(([^()]*)\)|[]\\[(){}*_|#+=.!~>`-]", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _linkSymbolReplacer = new Regex(@"[]\\[(){}*_|#+=.!~>`-]", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _boldReplacer = new Regex(@"<(strong|\/strong)\\>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _strikeThroughReplacer = new Regex(@"<(s|\/s)\\>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _underLineReplacer = new Regex(@"<(u|\/u)\\>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _italicReplacer = new Regex(@"<(em|\/em)\\>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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static readonly Regex _hTMLLinkReplacer = new Regex(@"<a.*?href=""(.*?)"".*?>(.*?)<\/a>", RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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public void ApplyFormating(NoticeMessage message)
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{
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var body = string.Empty;
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if (!string.IsNullOrEmpty(message.Subject))
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{
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body += _velocityArguments.Replace(message.Subject, ArgMatchReplace) + Environment.NewLine;
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message.Subject = string.Empty;
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}
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if (string.IsNullOrEmpty(message.Body)) return;
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var lines = message.Body.Split(new[] { Environment.NewLine, "\n" }, StringSplitOptions.None);
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for (var i = 0; i < lines.Length - 1; i++)
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{
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if (string.IsNullOrEmpty(lines[i])) { body += Environment.NewLine; continue; }
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lines[i] = _velocityArguments.Replace(lines[i], ArgMatchReplace);
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body += _linkReplacer.Replace(lines[i], EvalLink) + Environment.NewLine;
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}
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lines[lines.Length - 1] = _velocityArguments.Replace(lines[lines.Length - 1], ArgMatchReplace);
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body += _linkReplacer.Replace(lines[lines.Length - 1], EvalLink);
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body = _divPTagReplacer.Replace(body, "");
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body = _hTMLLinkReplacer.Replace(body, @"[$2]($1)");
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body = HttpUtility.HtmlDecode(body);
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body = _symbolReplacer.Replace(body, m => m.Groups[1].Success ? $@"[{_linkSymbolReplacer.Replace(m.Groups[1].Value, @"\$&")}]({m.Groups[2].Value})" : $@"\{m.Value}");
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body = _boldReplacer.Replace(body, "*");
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body = _strikeThroughReplacer.Replace(body, "~");
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body = _underLineReplacer.Replace(body, "__");
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body = _italicReplacer.Replace(body, "_");
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body = _tagReplacer.Replace(body, "");
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body = _multiLineBreaksReplacer.Replace(body, Environment.NewLine);
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message.Body = body;
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}
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private static string EvalLink(Match match)
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{
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if (match.Success)
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{
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if (match.Groups["text"].Success && match.Groups["link"].Success)
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{
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if (match.Groups["text"].Value.Equals(match.Groups["link"].Value, StringComparison.OrdinalIgnoreCase))
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{
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return " " + match.Groups["text"].Value + " ";
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}
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return match.Groups["text"].Value + string.Format(" ( {0} )", match.Groups["link"].Value);
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}
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}
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return match.Value;
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}
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private static string ArgMatchReplace(Match match)
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{
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return match.Result("${arg}");
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}
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}
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